I've seen that some Google Webfonts now use WOFF 2.0. Can I somehow convert my existing WOFF-fonts to this new (and supposedly better format)? And how?
I could't find any WOFF to WOFF2 converters, but you can easy convert your current WOFF font to TTF with any service like this. And then using this WOFF2 cheat sheet, convert TTF to WOFF2.
I tested those steps with my fonts, converted font WOFF -> TTF -> WOFF2 works fine.